Firstly - Could people STOP bitching about the fact that their Gmail/Hotmail/ISP/blah blah blah mail service isn't pushing to their phone. Why are people SO ill-informed? Apple has made no claims whatsoever about enabling push for every Tom Dick and Harry e mail service!
Ok, now I've got that off my chest... On to my experiences with MobileMe.
It's working pretty well. Push eMail today has been extremely sporadic. I've been testing it extensively, and yesterday it was working almost instantaneously, and yet, today it seems to have given up the ghost. I've tried deleting the .mac account from my iPhone and replacing it with a me account as someone suggested, but that doesn't seem to have made any difference.
The contact and calendar pushing works extremely well one way - i.e., from the iPhone to the cloud. If i put an entry into my iphone (calendar or contact) is pushes it to my mac within seconds. I can see the menu bar sync icon rotating shortly after I've finished putting in the contact. However, trying it the other way, as someone has alluded to, is not pushing it out immediately. In fact, I'm still waiting for an amendment that I've made to a contact on my laptop to end up on my iphone (7 mins later). I'm not sure whether the intention is to have this happen that same say as it did the other way around, or whether it was intending to have it wait for a 10 mins (or whatever) - who knows?! So in actual fact, the MobileMe services seem to be blinking into life. I shall continue testing over the next week to see how it progresses. If they don't sort out the intermittent pushing of e mail soon, then that is going to be annoying.
D